CN115441646B - Motor and complete machine dynamic balance method thereof - Google Patents
Motor and complete machine dynamic balance method thereof Download PDFInfo
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- CN115441646B CN115441646B CN202211397206.3A CN202211397206A CN115441646B CN 115441646 B CN115441646 B CN 115441646B CN 202211397206 A CN202211397206 A CN 202211397206A CN 115441646 B CN115441646 B CN 115441646B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/04—Balancing means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
- H02K15/165—Balancing the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
Abstract
The invention discloses a motor and a complete machine dynamic balance method thereof, belonging to the technical field of motors and comprising the following steps: the stator is respectively connected with a first end cover and a second end cover which are connected with the two sides of the stator; the stator is connected with the first end cover and the second end cover to form a closed space; further comprising: the rotor, the bearing and the bearing gland are arranged in the closed space; the bearing comprises a first bearing connected with a first end cover and a second bearing connected with a second end cover; the bearing gland is connected with the first end cover and the first bearing. The invention solves the technical problem that the motor needs to be subjected to dynamic balance calibration on the front balance ring and the rear balance ring of the rotor at the same time, and realizes the technical effect that the dynamic balance calibration can be carried out only by carrying out weight addition/weight reduction on the rear balance ring.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor and a complete machine dynamic balance method thereof.
Background
In the working process of the motor, imbalance is the main reason for causing overlarge vibration and noise of the motor, and the working performance, noise and service life of the motor are directly influenced, so that the dynamic balance calibration of the motor is particularly important.
In the prior art, dynamic balance calibration of a motor is usually performed by respectively arranging a front balancing ring and a rear balancing ring at the front end and the rear end of a rotor, and simultaneously performing weight adding/weight reducing in the front balancing ring and the rear balancing ring to enable the mass center and the geometric center of the rotor to coincide so as to perform dynamic balance calibration.
Disclosure of Invention
To solve the above problem, a first aspect of the present invention provides a motor including: the stator is respectively connected with a first end cover and a second end cover which are connected with the two sides of the stator;
the stator is connected with the first end cover and the second end cover to form a closed space;
further comprising:
the rotor, the bearing and the bearing gland are arranged in the closed space;
the bearing comprises a first bearing connected with a first end cover and a second bearing connected with a second end cover;
the bearing gland is connected with the first end cover and the first bearing.
Optionally, a through hole is formed in the middle of the bearing gland, and the through hole is a rotating shaft hole;
the bearing gland is also provided with a bulge which is a clamping part;
wherein, the clamping part is abutted with the bearing outer ring of the first bearing.
Optionally, a wave spring is disposed between the second bearing and the second end cap.
Optionally, the middle part of the first end cover close to one side of the closed space is recessed inwards, the recessed part is a first bearing chamber, and the non-recessed part is a fixing part;
the first bearing is arranged in the first bearing chamber; the bearing gland is connected with the fixing part;
the middle part of one side, close to the closed space, of the second end cover is inwards sunken, and the inner sunken part is a second bearing chamber;
the second bearing is arranged in the second bearing chamber;
the wave spring is arranged at the bottom of the second bearing chamber.
Optionally, the bearing outer ring of the first bearing abuts against the first end cover, and a gap is formed between the bearing inner ring and the first end cover.
Optionally, the rotor comprises:
the first bearing and the second bearing are respectively connected with the rotating shaft;
wherein, have the different positions of a plurality of diameters on the pivot, include:
the bearing connecting part is positioned on two sides of the load part;
and the bearing connecting parts positioned on two sides of the load part are respectively connected with the first bearing and the second bearing.
Optionally, the diameter of the load portion is larger than the diameter of the bearing connection portion;
and two ends of the load part are respectively abutted with the bearing inner rings of the first bearing and the second bearing.
Optionally, a plurality of threaded holes are further formed in the part, with the diameter length larger than that of the clamping part, of the bearing gland, and the threaded holes are fixing holes;
the fixing part is provided with a plurality of mounting holes matched with the fixing holes.
Optionally, a balance ring is further arranged on the rotor,
the balance ring is arranged near the joint of the rotating shaft and the second bearing and is positioned outside the closed space;
and a plurality of groups of balance holes distributed circumferentially are arranged on the balance ring.
The invention provides a complete machine dynamic balancing method applied to the motor in the scheme, which comprises the following steps: firstly, detecting a motor in operation by using dynamic balance equipment; and then, adding weight to the position of the balance ring required to calibrate the dynamic balance of the whole machine, wherein the method for calibrating the dynamic balance of the whole machine only uses the balance ring arranged near the joint of the rotating shaft and the second bearing to calibrate.
By adopting the technical scheme, the invention mainly has the following technical effects:
1. apply the ascending effort of axial to the rotor through setting up the bearing gland, and then reduce the vibration range of rotor at the first bearing junction, and through set up wave spring between second bearing and second end cover, utilize wave spring's cushioning effect to apply the ascending effort of axial to the second bearing, and wave spring's effort is unanimous with the effort direction of bearing gland, all toward motor torque output end, convert the rotor into the circular eccentric motion that uses first bearing as the fulcrum by the multi-direction vibration impact that axial impact brought originally. The dynamic balance calibration of the whole machine can be carried out by adding/subtracting weight near the joint of the rotor and the second bearing, the technical problem that the motor needs to be added/subtracted on the front balance ring and the rear balance ring of the whole machine respectively when carrying out dynamic balance calibration is solved, and the technical effect that the dynamic balance calibration can be carried out only by adding/subtracting weight on the rear balance ring of the whole machine is realized.
2. The dynamic balance calibration can be realized by arranging the balance ring behind the whole machine, the structure of the motor and the calibration method of the dynamic balance of the whole machine are simplified, and the production efficiency is improved.
3. The front end of the motor is a torque output end, the output end of the motor is connected with a machine tool (equipment), and the vibration value transmitted to the machine tool (equipment) by the motor is the minimum value in the motor, so that the influence on the machine tool (equipment) is effectively reduced.
Drawings
FIG. 1 is a schematic structural diagram of an electric machine according to the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is an enlarged view at B of FIG. 1;
FIG. 4 is a schematic structural diagram of a bearing gland in a motor according to the present invention;
fig. 5 is a schematic view of the vibration amplitude of the rotor in an electric machine according to the invention.
Wherein the reference numerals have the following meanings:
1. a stator;
2. a first end cap; 21. a first bearing chamber; 22. a fixed part; 23. mounting holes; 24. an isolation chamber;
3. a second end cap; 31. a second bearing chamber; 32. a wave spring;
4. a rotor; 41. a rotating shaft; 411. a load section; 412. a bearing connecting portion; 42. a balance ring; 421. a balance hole;
5. a bearing; 51. a first bearing; 52. a second bearing; 53. a bearing inner race; 54. a sliding ball; 55. a bearing outer race;
6. a bearing gland; 61. a rotating shaft hole; 62. a clamping part; 63. a fixing hole;
C. a rotor front end; D. the rear end of the rotor.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1 to 4, in a first aspect, the present invention provides a motor, including a stator 1, and a first end cover 2 and a second end cover 3 respectively connected to two sides of the stator 1, where the stator 1 is connected to the first end cover 2 and the second end cover 3 at two sides to form a closed space, and the motor further includes a rotor 4, a bearing 5, and a bearing cover 6 disposed in the closed space. In the present invention, the axial direction refers to a direction in which the rotation axis of the rotating shaft is located, i.e., a direction common to the central axis.
Further, the stator 1 is connected with the first end covers 2 and the second end covers 3 on two sides to form a closed space, so that foreign matters can be effectively prevented from entering the motor, and the internal structure of the motor can be prevented from being damaged by mechanical collision, and a good protection effect is achieved. The stator 1 is a stationary fixed part of the motor and can generate a rotating magnetic field after current is introduced; the rotor 4 is a rotating part of the motor, and can obtain electromagnetic torque to rotate under the action of a rotating magnetic field generated by the stator 1 based on an electromagnetic induction phenomenon.
Further, the rotor 4 is connected to the first end cover 2 and the second end cover 3 through bearings 5, respectively, so that the first end cover 2 and the second end cover 3 serve to fix the rotor 4. In addition, the centers of the first end cover 2 and the second end cover 3 are respectively provided with a circular through hole through which the rotor 4 can penetrate, and the circular through holes are motor holes, so that the rotor 4 can extend out of the closed space through the motor holes to be connected with other transmission parts or parts.
It will be appreciated that the bearing 5 comprises a first bearing 51 connected to the first end cap 2 and a second bearing 52 connected to the second end cap 3.
In a preferred embodiment, the middle of the first end cover 2 near one side of the closed space is recessed inwards, the inner recess is a cylindrical first bearing chamber 21, and the un-recessed part of the first end cover 2 connected with the first bearing chamber 21 is a fixing part 22. The first bearing chamber 21 is used for arranging the first bearing 51, i.e. the inner diameter of the first bearing chamber 21 is adapted to the outer diameter of the first bearing 51, so that the first bearing 51 can be arranged in the first bearing chamber 21.
It will be appreciated that the bearing 5 comprises an inner bearing ring 53, sliding balls 54 connected to the inner bearing ring 53, and an outer bearing ring 55 connected to the sliding balls 54. The outer walls of the sliding balls 54 are connected to the outer circumference of the bearing inner ring 53 and the inner circumference of the bearing outer ring 55, respectively, and the bearing inner ring 53 is connected to the rotor 4, thereby fixing the rotor 4 to the first and second covers 2 and 3.
Specifically, the depth of the first bearing chamber 21 is set to a length along the axial direction, wherein the depth of the first bearing chamber 21 is greater than the thickness of the first bearing 51, so that when the first bearing 51 is disposed in the first bearing chamber 21, after one end surface of the first bearing 51 is in contact with the end surface at the lowermost end of the first bearing chamber 21, a certain distance is provided between the other end surface of the first bearing 51 and the open end of the first bearing chamber 21.
With further reference to fig. 2, it can be understood that the bottom of the first bearing chamber 21 is further provided with an inward recessed isolation cavity 24, wherein the diameter of the isolation cavity 24 is smaller than the outer diameter of the bearing outer ring 55 of the first bearing 51 and larger than the inner diameter of the bearing outer ring 55 of the first bearing 51, so that the first bearing 51 in the first bearing chamber 21 is actually abutted against the first end cover 2 in a manner that the bearing outer ring 55 of the first bearing 51 is abutted against the first end cover 2, that is, a gap exists between the first end cover 2 and the bearing inner ring 53 of the first bearing 51, thereby preventing the first end cover 2 from affecting the bearing inner ring 53 rotating along with the rotor 4.
Further, the middle portion of the side of the second end cap 3 close to the closed space is also recessed inwards, and the recessed portion is a cylindrical second bearing chamber 31, and the second bearing chamber 31 is used for accommodating a second bearing 52.
It should be understood that the first bearing chamber 21 and the first bearing 51, and the second bearing chamber 31 and the second bearing 52 are disposed in a clearance fit.
Further, the stator 1 comprises a stator core and a stator winding, wherein the stator core is cylindrical and is a part of a magnetic circuit of the motor and used for installing and fixing the stator winding; the stator winding is a winding fixed on a stator iron core, is a component of a circuit in the motor, and can generate a rotating magnetic field after three-phase alternating current is introduced.
Further, the rotor 4 includes a rotating shaft 41 having a certain mechanical strength and rigidity, which can transmit torque and support the rotor 4 to rotate, and the rotating shaft 41 has a plurality of portions with different diameters, including a load portion 411 at the middle portion and bearing connection portions 412 at both sides of the load portion 411. Specifically, the load portion 411 is used for installing components such as a rotor core, and two sets of bearing connection portions 412 located at two sides of the load portion 411 are respectively connected to the first bearing 51 and the second bearing 52, so that the rotor 4 is connected to the first end cover 2 and the second end cover 3 through the bearing 5.
In a preferred embodiment, the diameter of the load portion 411 is larger than the diameter of the bearing connection portion 412, specifically, the diameter of the load portion 411 is smaller than the outer diameter of the bearing inner ring 53 and larger than the inner diameter of the bearing inner ring 53, so that after the bearing connection portion 412 is connected to the first bearing 51 and the second bearing 52, respectively, the two ends of the load portion 411 are respectively abutted against the bearing inner rings 53 of the first bearing 51 and the second bearing 52, thereby limiting the first bearing 51 in the first bearing chamber 21; the function of limiting said second bearing 52 in the second bearing chamber 31.
Referring to fig. 4, fig. 4 is a schematic structural diagram of the bearing gland 6, the bearing gland 6 is a circular ring structure, and a through hole through which the rotating shaft 41 can pass is also formed in the middle of the bearing gland, and the through hole is a rotating shaft hole 61.
In a preferred embodiment, a circular-ring-shaped protrusion is disposed on one side of the bearing gland 6, the protrusion is a clamping portion 62, wherein the circular-ring-shaped clamping portion 62 is in clearance fit with the first bearing chamber 21, that is, the outer diameter of the circular-ring-shaped clamping portion 62 is slightly smaller than the diameter of the circular first bearing chamber 21, so that when the side of the bearing gland 6 on which the clamping portion 62 is disposed is connected to the first end cap 2, the circular-ring-shaped clamping portion 62 can enter the first bearing chamber 21.
Further, the width of the clamping portion 62 in the axial direction is adapted to the depth of the first bearing chamber 21 and the thickness of the first bearing 51, so that after the bearing gland 6 is connected to the first end cap 2, the clamping portion 62 is just abutted to the bearing outer ring 55 of the first bearing 51 after entering the first bearing chamber 21, thereby axially limiting the bearing outer ring 55. As is well known, the bearing outer ring 55 has a circular ring-shaped structure, and the engagement portion 62 is formed in a circular ring shape, so that the tightness of the engagement portion 62 when it abuts against the bearing outer ring 55 can be increased to a limited extent, and the function of the bearing cover 6 for axially restraining the first bearing 51 can be increased.
Further, a plurality of threaded holes are further formed in the portion, with the diameter being larger than the clamping portion 62, of the annular bearing gland 6, the threaded holes are fixing holes 63, and the fixing holes 63 are distributed in a circular shape on the bearing gland 6. In addition, a plurality of mounting holes 23 matched with the fixing holes 63 are further formed in the fixing portion 22 of the first end cover 2, and an operator can fix the bearing pressing cover 6 on the first end cover 2 by connecting the fixing holes 63 after passing through the mounting holes 23 through screws, so that the effect of facilitating disassembly and assembly is achieved.
Further, a wave spring 32 is arranged between the second bearing 52 and the end surface of the lowest end of the second bearing chamber 31.
It is understood that when the rotor 4 rotates around its axis during operation of the motor, the rotor 4 will vibrate due to the misalignment of the centroid and the geometric center of the rotor 4.
Referring to fig. 1 and 5, the bearing gland 6 is disposed to axially limit the first bearing 51, and the wave spring 32 is disposed between the second bearing 52 and the second end cap 3. An axial acting force is applied to the first bearing 51 by the limiting action of the clamping part 62, so that the axial acting force is applied to the vibrating rotor 4 at the joint of the rotating shaft 41 and the first bearing 51, and the function of reducing the vibration amplitude of the rotor 4 at the joint of the first bearing 51 is achieved; and by arranging the wave spring 32 between the second bearing 52 and the second end cover 3, the axial acting force is applied to the second bearing 52 by the buffer action of the wave spring 32, and the multi-directional vibration impact originally brought by the axial impact of the rotor 4 is converted into the circular eccentric motion with the first bearing 51 as a fulcrum.
Therefore, the motor structure provided by the present application can calibrate the dynamic balance of the whole motor by adding/subtracting weight near the joint of the rotating shaft 41 and the second bearing 52 when the motor is dynamically balanced, which will be described in further detail below.
Referring to fig. 1, the rotating shaft 41 of the rotor 4 is further provided with a balance ring 42, the balance ring 42 is disposed near the joint of the rotating shaft 41 and the second bearing 52 and is located outside the enclosed space, the balance ring 42 is an annular structure, and a plurality of groups of balance holes 421 distributed circumferentially around the rotating shaft 41 are formed in the ring structure, and the dynamic balance of the whole machine can be calibrated by adding/subtracting weight in the balance holes 421.
The second aspect of the invention provides a complete machine dynamic balancing method of a motor, which is carried out by adopting the motor in the scheme and comprises the following steps:
(a) Detecting a motor in operation by using dynamic balance equipment;
the step is to measure the size and the position of the unbalance amount of the rotor 4 by a dynamic balancing machine;
(b) Adding weight at the position of the balance ring required to calibrate the dynamic balance of the whole machine;
this step is to add weight (install weight-added screw) in the balance hole 421 of the balance ring 42 of the motor in the above scheme to calibrate the dynamic balance of the whole machine;
it will be appreciated by those skilled in the art that the dynamic balancing apparatus measures the magnitude and position of the unbalance of the rotor 4 during operation and adds/subtracts weight in the balancing ring 42 to calibrate the overall dynamic balance.
The above steps are only calibrated by the balancing ring 42 provided near the junction between the rotating shaft 41 and the second bearing 52.
Example one
Firstly, a bearing end cover is arranged at a front bearing of a motor to apply axial acting force to the front bearing by adopting a vertical motor, then a steel wave spring 32 is arranged at a rear bearing of the motor to apply axial buffering acting force to the rear bearing, and the acting force of the wave spring 32 is consistent with the acting force direction of a bearing gland 6 and is towards the torque output end of the motor; finally, the magnitude and the position of the running unbalance of the rotor 4 are measured by using dynamic balance equipment, and the dynamic balance of the whole machine is calibrated by adding weight at the required position of the balance ring 42.
Embodiment one dynamic balance test and complete machine dynamic balance calibration
The results of the complete machine dynamic balance record table are shown in the following table 1:
TABLE 1 complete machine dynamic balance recording table
After another vertical motor is replaced, the dynamic balance test and the complete machine dynamic balance calibration are carried out again, and the results of the complete machine dynamic balance record table are shown in the following table 2:
TABLE 2 complete machine dynamic balance recording table
The data in table 1 and table 2 are analyzed, wherein, no matter the initial vibration value or the calibrated vibration value, the vibration value of the front end of the motor is always smaller than the vibration value of the rear end of the motor, so that the dynamic balance of the whole machine can be calibrated only by adding/losing weight in the balance ring of the rear end of the motor.
Dynamic balance calibration can be realized by adding/subtracting weight in the balance ring, the structure of the motor and the calibration method of the whole machine dynamic balance are simplified, and the production efficiency is improved.
In addition, it should be understood that the front end of the motor is an output end, and after the output end of the motor is connected with the machine tool (equipment) in the above structure, the vibration value transmitted to the machine tool (equipment) by the motor is the smallest in the motor, so that the influence on the machine tool (equipment) is effectively reduced.
Finally, it should be noted that: the embodiment of the present invention is disclosed only as a preferred embodiment of the present invention, which is only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. An electric machine, comprising: the stator is respectively connected with a first end cover and a second end cover which are connected with the two sides of the stator;
the stator is connected with the first end cover and the second end cover to form a closed space;
further comprising:
the rotor, the bearing and the bearing gland are arranged in the closed space;
the bearing comprises a first bearing connected with a first end cover and a second bearing connected with a second end cover;
the bearing gland is connected with the first end cover and the first bearing;
the bearing gland is also provided with a bulge which is a clamping part; the clamping part is circular;
wherein the clamping part is abutted with a bearing outer ring of the first bearing;
a wave spring is arranged between the second bearing and the second end cover;
the rotor includes:
the first bearing and the second bearing are respectively connected with the rotating shaft;
wherein, have the different positions of a plurality of diameters on the pivot, include:
the bearing connecting part is positioned on two sides of the load part;
the bearing connecting parts positioned on two sides of the load part are respectively connected with the first bearing and the second bearing; the diameter of the load part is larger than that of the bearing connecting part;
the two ends of the load part are respectively abutted with the bearing inner rings of the first bearing and the second bearing;
the bearing outer ring of the first bearing is abutted against the first end cover, and a gap is formed between the bearing inner ring and the first end cover;
the clamping part is abutted with the bearing outer ring and then applies an axial acting force to the first bearing so as to reduce the vibration amplitude of the connection part of the rotor and the first bearing;
the wave spring applies an axial acting force to the second bearing through a buffer action;
the clamping part and the wave spring act together to convert the multidirectional vibration impact of the rotor into circular eccentric motion with the first bearing as a fulcrum;
the rotor is also provided with a balance ring, wherein the balance ring is arranged near the joint of the rotor and the second bearing and is positioned outside the closed space; and a plurality of groups of balance holes distributed circumferentially are arranged on the balance ring.
2. The motor of claim 1, wherein the bearing cover has a through hole in the middle, and the through hole is a rotating shaft hole.
3. The motor of claim 2, wherein the first end cap is recessed inwardly in the middle of the side thereof adjacent to said closed space, the recessed part is a first bearing chamber, and the non-recessed part is a fixing part;
the first bearing is arranged in the first bearing chamber; the bearing gland is connected with the fixing part;
the middle part of one side, close to the closed space, of the second end cover is inwards sunken, and the inner sunken part is a second bearing chamber;
the second bearing is arranged in the second bearing chamber;
the wave spring is arranged at the bottom of the second bearing chamber.
4. The motor of claim 3, wherein the bearing cover is further provided with a plurality of threaded holes on the portion having a diameter larger than the clamping portion, and the threaded holes are fixing holes;
the fixing part is provided with a plurality of mounting holes matched with the fixing holes.
5. The whole dynamic balancing method applied to the motor of any one of claims 1 to 4 comprises the following steps: firstly, detecting a motor in operation by using dynamic balance equipment; and then, adding weight to the position of the balance ring required to calibrate the dynamic balance of the whole machine, wherein the method for calibrating the dynamic balance of the whole machine is only used for calibrating the balance ring arranged near the joint of the rotating shaft and the second bearing.
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| CN202211397206.3A CN115441646B (en) | 2022-11-09 | 2022-11-09 | Motor and complete machine dynamic balance method thereof |
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| CN202211397206.3A CN115441646B (en) | 2022-11-09 | 2022-11-09 | Motor and complete machine dynamic balance method thereof |
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| CN106089775A (en) * | 2016-08-18 | 2016-11-09 | 北京超同步伺服股份有限公司 | Fan blade blower is supported for cooling down the unilateral of motor |
| CN207010442U (en) * | 2017-07-04 | 2018-02-13 | 江苏派迪车辆技术有限公司 | A kind of wheel hub motor for automobile |
| CN109861437A (en) * | 2019-02-20 | 2019-06-07 | 沈阳兴华航空电器有限责任公司 | A kind of adjustable electric machine structure of wheelbase and its assembly method |
| CN215528789U (en) * | 2021-08-30 | 2022-01-14 | 大连日牵电机有限公司 | Compact rotor dynamic balance structure of small motor |
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